Blood-viscosity measurement method

Patent metadata

Field	Value
Publication number	US-12569148-B2
Application number	US-201917788509-A
Country	US
Kind code	B2
Filing date	Dec 27, 2019
Priority date	Dec 27, 2019
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

A blood-viscosity measurement method uses a collection tube includes a bottomed tube having an opening at one end in a length direction and a bottom at the other end in the length direction. A sealing plug includes a sealing part fitted in the opening of the bottomed tube in a hermetically sealed state, a cap part, and a thin connecting part. The sealing part includes a vertically penetrated insertion hole and fitted in the opening of the bottomed tube. The method includes collecting blood using a negative pressure state of the inner space, applying an external force to the cap portion to break the connecting part and removing the cap part to expose the insertion hole at an upper surface of the sealing part, and obtaining blood viscosity by causing a viscosity-measurement falling body to fall from the insertion hole, and measuring a fall terminal velocity of the falling body.

First claim

The invention claimed is:

1 . A blood-viscosity measurement method, the method comprising:
providing a blood-viscosity measurement blood collection tube, wherein the blood-viscosity measurement blood collection tube comprises (i) a bottomed tube, the bottomed tube comprising an opening at one end in a length direction, a bottom at the other end in the length direction, and an inner space, and (ii) a sealing plug, the sealing plug comprising a sealing part being fitted in the opening of the bottomed tube in a hermetically sealed state, a cap part, and a thin connecting part connecting the cap part and the sealing part; the sealing part comprising a vertically penetrated insertion hole, the sealing part being fitted in the opening of the bottomed tube in a hermetically sealed state, the cap part comprising a needle insertion hole, and the inner space of the bottomed tube being in a negative pressure state; inserting a needle through the needle insertion hole; collecting blood into the inner space of the bottomed tube by using the negative pressure state of the inner space to draw blood through the needle into the inner space; applying an external force to the cap part of the sealing plug of the blood collection tube to break the connecting part; removing the cap part to expose the insertion hole at an upper surface of the sealing part; inserting a viscosity-measurement falling body into the insertion hole and allowing it to fall through the blood in the inner space of the bottomed tube; and measuring a blood viscosity by measuring a fall terminal velocity or fall acceleration of the viscosity-measurement falling body falling through the blood in the inner space of the bottomed tube.

2 . The blood-viscosity measurement method as recited in claim 1 ,
wherein a guide tube communicated with the vertically penetrated insertion hole is secured to the sealing part in a downwardly extended manner.

3 . The blood-viscosity measurement method as recited in claim 2 ,
wherein the guide tube comprises one or a plurality of apertures or slits formed on a side surface of the guide tube.

4 . The blood-viscosity measurement method as recited in claim 3 , wherein the viscosity-measurement falling body drops in a vertically downward direction through the guide tube and air is discharged from the guide tube through at least one of the apertures or slits.

5 . The blood-viscosity measurement method as recited in claim 1 , wherein the viscosity-measurement falling body comprises a metal weight disposed inside a bottomed axially elongated cylindrical body.

6 . The blood-viscosity measurement method as recited in claim 4 , wherein the viscosity-measurement falling body further comprises a lid.

7 . The blood-viscosity measurement method as recited in claim 6 , wherein the bottomed axially elongated cylindrical body comprises resin.

8 . A blood-viscosity measurement method, the method comprising:
providing a blood-viscosity measurement blood collection tube, wherein the blood-viscosity measurement blood collection tube comprises (i) a bottomed tube, the bottomed tube comprising an opening at one end in a length direction, a bottom at the other end in the length direction, and an inner space, the inner space being in a negative pressure state, and (ii) a sealing plug, the sealing plug comprising a sealing part being fitted in the opening of the bottomed tube in a hermetically sealed state, a cap part, and a thin connecting part connecting the cap part and the sealing part; the sealing part comprising a vertically penetrated insertion hole, the sealing part being fitted in the opening of the bottomed tube in a hermetically sealed state; wherein a guide tube communicated with the vertically penetrated insertion hole is secured to the sealing part in a downwardly extended manner; and wherein the guide tube comprises one or a plurality of apertures or slits formed on a side surface of the guide tube; collecting blood into the inner space of the bottomed tube by using the negative pressure state of the inner space; applying an external force to the cap part of the sealing plug of the blood collection tube to break the connecting part; removing the cap part to expose the insertion hole at an upper surface of the sealing part; inserting a viscosity-measurement falling body into the insertion hole and allowing it to fall through the blood in the inner space of the bottomed tube; and measuring a blood viscosity by measuring a fall terminal velocity or fall acceleration of the viscosity-measurement falling body falling through the blood in the inner space of the bottomed tube.

9 . The blood-viscosity measurement method as recited in claim 8 , wherein the viscosity-measurement falling body comprises a metal weight disposed inside a bottomed axially elongated cylindrical body.

10 . The blood-viscosity measurement method as recited in claim 9 , wherein the viscosity-measurement falling body further comprises a lid.

11 . The blood-viscosity measurement method as recited in claim 9 , wherein the bottomed axially elongated cylindrical body comprises resin.

12 . The blood-viscosity measurement method as recited in claim 8 , wherein the viscosity-measurement falling body drops in a vertically downward direction through the guide tube and air is discharged from the guide tube through at least one of the apertures or slits.

13 . A blood-viscosity measurement method, the method comprising:
providing a blood-viscosity measurement blood collection tube, wherein the blood-viscosity measurement blood collection tube comprises (i) a bottomed tube, the bottomed tube comprising an opening at one end in a length direction, a bottom at the other end in the length direction, and an inner space, the inner space being in a negative pressure state, and (ii) a sealing plug, the sealing plug comprising a sealing part being fitted in the opening of the bottomed tube in a hermetically sealed state, a cap part, and a thin connecting part connecting the cap part and the sealing part; the sealing part comprising a vertically penetrated insertion hole comprising a length, the sealing part being fitted in the opening of the bottomed tube in a hermetically sealed state; and a guide tube secured to the sealing part in a downwardly extended manner, the guide tube being communicated with the vertically penetrated insertion hole along an entirety of the length of the vertically penetrated insertion hole; collecting blood into the inner space of the bottomed tube by using the negative pressure state of the inner space; applying an external force to the cap part of the sealing plug of the blood collection tube to break the connecting part; removing the cap part to expose the insertion hole at an upper surface of the sealing part; inserting a viscosity-measurement falling body into the insertion hole and allowing it to fall through the blood in the inner space of the bottomed tube; and measuring a blood viscosity by measuring a fall terminal velocity or fall acceleration of the viscosity-measurement falling body falling through the blood in the inner space of the bottomed tube.

14 . The blood-viscosity measurement method as recited in claim 13 , wherein the guide tube comprises one or a plurality of apertures or slits formed on a side surface of the guide tube.

15 . The blood-viscosity measurement method as recited in claim 14 , wherein the viscosity-measurement falling body drops in a vertically downward direction through the guide tube and air is discharged from the guide tube through at least one of the apertures or slits.

16 .

Assignees

• Medical Univ Of Vienna
• Univ Kansai
• Taisei Kako Co
• Asahi Group Holdings Ltd

Inventors

• Plasenzotti Roberto
• Podesser Bruno Karl
• Yamamoto Hideki
• Negi Yusuke
• YABUTA Takafumi
• Nishikura Hidenari
• Tamura Eiji
• Kawamura Kimito

Classifications

• A61B5/150343

  Collection vessels for collecting blood samples from the skin surface, e.g. test tubes, cuvettes (sampling from within body cavities A61B5/150015, A61B5/150045) · CPC title

• A61B5/150251

  Collection chamber divided into at least two compartments, e.g. for division of samples (injection syringes having more than one chamber A61M5/19; syringes for injection of two or more media A61M5/2448, A61M5/284; sample preparation for further analysis A61B5/150755) · CPC title

• A61B5/150099

  by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes · CPC title

• G01N33/49

  Blood {(chemical methods for determining blood cell populations G01N33/5094; chemical analysis of blood groups or blood types G01N33/80)} · CPC title

• A61B5/02035 Primary

  Determining blood viscosity · CPC title